.top {
    min-height: 300px;
    background: #eee;
}
.banner {
    height: 500px;
    background: url(../../img/bg.png) no-repeat;
    background-size: 100%;
    background-position: center;
}
.head-nav {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    opacity: .55;
    background: -moz-linear-gradient(top,rgba(0,0,0,.91),rgba(0,0,0,0));
    background: -webkit-gradient(linear,0 top,0 bottom,from(rgba(0,0,0,.91)),to(rgba(0,0,0,0)));
    background: -o-linear-gradient(top,rgba(0,0,0,.91),rgba(0,0,0,0));
    background: -ms-linear-gradient(top,rgba(0,0,0,.91),rgba(0,0,0,0));
    background: linear-gradient(top,rgba(0,0,0,.91),rgba(0,0,0,0));
}
.logo {
    width: 50px;
    margin: 20px;
}
.logo img {
    width: 100%;
}
.banner-inner {
    width: 300px;
    margin: 100px auto 50px auto;
    height: 50px;
    text-align: center;
    background: transparent;
    border-radius: 4px;
}
.banner-inner button {
    width: 100%;
    height: 100%;
    font-size: 15px;
    font-weight: 500;
    background: rgba(0,0,0,0.3);
    color: #fff;
}
.bot {
    min-height: 300px;
}
.demo-carousel {
    height: 100%;
    width: 100%;
    line-height: 300px;
    text-align: center;
}
.section-group {
    height: 350px;
    background: rgba(0,0,0,0.1);
    display: flex;
}
.section-item {
    height: 100%;
    width: 50%;
    padding: 10px;
}
.talk-wrapper,.map-wrapper,.card-item {
    width: 100%;
    height: 100%;
}
.card-item .ivu-card-body {
    width: 100%;
    height: 100%;
}
.card-content {
    display: flex;
    width: 100%;
    height: 100%;
}
.card-content .title {
    width: 20px;
}
.card-content .preview {
    width: 200px;
    margin: 0 20px;
}
.card-content .preview img {
    width: 100%;
}
.card-content .map-preview {
    margin: 0 20px;
    height: 296px;
}
.card-content .brief {
    width: 400px;
    overflow: hidden;
    text-indent: 2em;
}